A solar eclipse will occur Friday, March 20, meaning that the moon obscures the sun from Earth's view. The total eclipse will only be visible on remote islands in far northern Europe, but those in the U.S. can watch starting at 4:30 a.m. ET on Slooh.com. The moon will also be a supermoon, which occurs during the moon's closest approach to Earth on its orbit. Check out 10 surprising facts about Earth's closest neighbor.